Black Saturday for ITV1 ratings

ITV1 suffered what is believed to be its worst-performing Saturday ever in the ratings at the weekend.

According to early ratings data, the channel recorded an all-hours share of just 10.2%, down from its year-to-date Saturday average of 17.5% and trailing BBC One's share of 26.9%. The figure is also the second worst ever performance for ITV1, ahead of the miserable 9.1% share recorded on July 9, 2006.

The channel's top programme of the day was Who Dares Sings!, a new karaoke-themed gameshow fronted by Ben Shephard and Denise van Outen. It drew 3.7m (18.8%) in the 8pm hour but was beaten by BBC One's rival gameshow National Lottery: 1 vs 100 - also fronted by Shephard - with an average of 4.6m (24%).

Ratings slumped to just 1.4m (7.7%) for the movie Wimbledon, shown between 9pm and 11pm, while BBC One's Casualty managed a respectable 5.5m (27.7%).

The best performing show of the day on any channel was Doctor Who, which drew an impressive 7.4m (38.2%) between 7.10pm and 8pm. Spinoff programme Doctor Who Confidential followed with 1.1m (6.8%) on BBC Three.